FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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CHEMICAL SUPPLIER AGREEMENT FOR THE PURCHASE OF LIQUID ANIONIC POLYMER, SPECIFICATION NO. SSJ 2945
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Sole Source Chemical Supplier Agreement with Polydyne, Inc. for the purchase of Liquid Anionic Polymer, Specification No. SSJ 2945, for a five-year term beginning November 1, 2026, through October 31, 2031, for a total unit price of $5.18 per active pound delivered plus applicable sales tax for a total estimated first-year cost of $600,880; and
B. Approve an annual unit price contingency increase of up to 5%, estimated at $30,044 for the first year.
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BACKGROUND
The Orange County Sanitation District (OC San) uses anionic polymer and ferric chloride at Plant Nos. 1 and 2 to improve the removal of suspended solids and organic material during primary treatment. This process, known as chemically enhanced primary treatment (CEPT), improves settling and reduces the organic and solids loading transferred to secondary treatment.
Secondary treatment is more energy intensive than primary treatment because additional organic loading requires increased aeration. Increasing primary solids capture also improves overall solids management by directing more organic material to anaerobic digestion, where it can contribute to digester gas production. Addition of anionic polymer supports effective CEPT operation therefore supports treatment capacity, energy efficiency, solids management, and overall plant reliability.
RELEVANT STANDARDS
Meet volume and water quality needs for the GWRS
Comply with environmental permit requirements
24/7/365 treatment plant reliability
PROBLEM
The existing liquid anionic polymer contract expires on October 31, 2026, with no renewal options remaining. A new agreement is require...
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